return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H5OO (ethylperoxy radical)

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-229.503705
Energy at 298.15K-229.509665
HF Energy-229.503705
Nuclear repulsion energy124.221215
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3PW91/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3132 3015 20.04      
2 A' 3071 2957 16.38      
3 A' 3056 2942 13.32      
4 A' 1519 1462 8.24      
5 A' 1506 1449 1.17      
6 A' 1429 1376 25.74      
7 A' 1388 1336 6.86      
8 A' 1226 1180 16.10      
9 A' 1147 1105 6.16      
10 A' 1036 998 16.92      
11 A' 856 824 2.36      
12 A' 512 493 10.33      
13 A' 308 296 1.71      
14 A" 3143 3026 39.58      
15 A" 3118 3002 1.87      
16 A" 1497 1441 9.22      
17 A" 1291 1243 0.29      
18 A" 1158 1115 5.35      
19 A" 804 774 1.73      
20 A" 225 216 0.35      
21 A" 83 80 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 15752.6 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 15165.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3PW91/6-311G*
ABC
1.12704 0.14795 0.13756

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.488 0.916 0.000
C2 0.000 0.674 0.000
O3 -0.211 -0.764 0.000
O4 -1.482 -1.065 0.000
H5 1.689 1.990 0.000
H6 1.958 0.483 0.886
H7 1.958 0.483 -0.886
H8 -0.496 1.070 -0.889
H9 -0.496 1.070 0.889

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.50802.38993.57061.09301.09241.09242.17982.1798
C21.50801.45332.28472.14192.15772.15771.09271.0927
O32.38991.45331.30623.34662.65432.65432.05862.0586
O43.57062.28471.30624.40383.87513.87512.51472.5147
H51.09302.14193.34664.40381.76921.76922.53222.5322
H61.09242.15772.65433.87511.76921.77203.08522.5233
H71.09242.15772.65433.87511.76921.77202.52333.0852
H82.17981.09272.05862.51472.53223.08522.52331.7786
H92.17981.09272.05862.51472.53222.52333.08521.7786

picture of ethylperoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 107.597 C1 C2 H8 112.918
C1 C2 H9 112.918 C2 C1 H5 109.840
C2 C1 H6 111.142 C2 C1 H7 111.142
C2 O3 O4 111.660 O3 C2 H8 107.058
O3 C2 H9 107.058 H5 C1 H6 108.107
H5 C1 H7 108.107 H6 C1 H7 108.400
H8 C2 H9 108.951
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.689      
2 C -0.216      
3 O -0.122      
4 O -0.156      
5 H 0.235      
6 H 0.241      
7 H 0.241      
8 H 0.233      
9 H 0.233      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.620 2.481 0.000 2.963
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.906 -1.207 0.000
y -1.207 -25.149 0.000
z 0.000 0.000 -23.090
Traceless
 xyz
x -1.787 -1.207 0.000
y -1.207 -0.651 0.000
z 0.000 0.000 2.438
Polar
3z2-r24.877
x2-y2-0.757
xy-1.207
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.599 0.973 0.000
y 0.973 4.623 0.000
z 0.000 0.000 3.765


<r2> (average value of r2) Å2
<r2> 89.049
(<r2>)1/2 9.437